Tuesday Teasers is hosted by Should Be Reading.
The rules are as follows:
Grab your current read and let the book fall open to a random page.
Share two sentences from somewhere on that page and the title of the
book that you’re getting the teaser from. Please avoid spoilers! Read
the official Tuesday Teaser Rules.

I received Case Histories by Kate Atkinson from LibraryThing's Secret Santa event. The teaser is from page 83:

Her complaint, the reason she had originally engaged Jackson's services, was that someone was stealing her cats. Jackson couldn't work out whether cats really did go missing or whether she just thought they went missing.